Rose growing myths

Roses have been cherished and grown in gardens for very many generations. In some instances, the published or suggested advice has become outdated and is no longer practical or has been superstition all along. We believe that rose growing is easy and that by following the basics, you can enjoy roses that flourish and provide […]

Wilt or thorn beetle

The capsized stems are tyopical of wilt or thorn beetle damage. The Wilt or Thorn beetle is able to cause considerable damage to the soft shoots of a rose bush. Fortunately they are a very uncommon pest in gardens and it it not often that one finds them a problem. Most Insecticides get rid of them.

White fly

Severe white fly damage to rose leaves. When: White fly infestations can occur from summer to autumn, but they are uncommon to settle on roses. Where: country wide Remedy: Apply Koinor as a drench. Watch this video on how to apply Koinor. Spray with Plant Care. The rape oil contained in Ludwig’s Insect Spray which is the main […]

Thrips

Thrips are a type of invisible plague to roses and many other ornamental and even fruit and vegetable plants! They can be tough customers to get rid of once they have invaded your roses – but with the right advice and by spraying with effective insecticides it can be done.   Visible damage to the the […]

termites

Termites can attack a rose bush and ring bark it. The bark is eaten close to where the main stem comes out of the ground. When: Prevalent in drier periods, but can occur any time of the year. Where: common in coastal KZN and Midrand, Gauteng. Remedy: apply Karbadust or Blue Death powder at bottom of holes prior […]

rose borer wasp damage

If you notice holes that have been made into your rose stems, then you can be sure that the rose stem borer has been visiting.   When:   Prevalent after pruning, but can occur any time of the year   Remedy:   Seal stems with Steriseal, PVA paint or mud after cutting   Frequency:   […]

Rose chafer beetle (eats blooms)

The Rose chafer beetle, fruit chafer beetle or African fruit beetle just loves devouring rose buds. They have their preference and we wish we knew exactly what attracted them to a specific variety in a field of a thousand. When:   Summer   Remedy:   Spray with Plant Care on entire plant & directly onto […]

Chafer beetles

If your rose bush looks anything like this, then Chafer beetles have been eating away at your leaves during the night. That is why one doesn’t necessarily see the beetles causing the damage.     When:     Summer     Remedy:     Spray with Plant Care on entire plant & on soil around […]

Bollworm

Caterpillars that chew holes and tunnels through your rose blooms are referred to as bollworms. A female moth lays her eggs onto the usually still closed bud. When the caterpillars hatch from their eggs they start feeding on the blooms. As they feed they grow and go through various instars before they eventually pupate in […]

Pernicious scale

Introduction Pernicious scale is a sedentary sucking insect that inserts its tiny, straw-like mouthparts into the bark of rose stems, weakening growth and reducing sap flow. In extreme cases, whole stems can die-back but in small, isolated numbers they do not pose a real threat to the rose. Their presence is a sign of plant […]

Spider Mite or Red Spider

Introduction Spider mites are small arachnids related to spiders and are common in hot and dry conditions. Roses under heat and drought stress are particularly vulnerable to attack, special attention should be given to roses in pots during particularly hot periods to avoid infestation. This pest feeds and breeds on the underside of rose leaves. […]

Aphids

Koinor is a systemic, contact, suspension concentrate insecticide for the control of various pests on plants. Its active ingredient is: Imidacloprid (chloronicotinyl) 350g/ℓ. It is easily applied as a drench. It is effective! Introduction Aphids, also known as greenfly and blackfly, are sap-sucking insects found on the roses’ soft new growth throughout the growing season. […]

Plant Nutrition and Chlorosis

Article of Plant Nutrition and Chlorosis by Ludwig Taschner The inexplicable chlorosis that often occurs with rose plants triggered off my thinking and a bit of research. Why would roses be perfectly happy and have dark green leaves up until their first flowering and then produce chlorotic new growth with the sprouting of new leaves […]

Koinor for control of thrips

KOINOR active ingredient is imidacloprid This synthetic derivative of nicotine is a systemic insecticide that translocates to all parts of the plant when applied as a drench over the rooting zone or when sprayed on leaves of the plant. When drenched, it gives protection against small insects for a growing season or about 6 months. […]

Winter Pruning

Roses rejuvenate themselves by producing new stems from the base on a regular basis. Left unpruned, roses eventually carry out their own pruning by not nourishing the thinner inside growth, which slowly dries out completely and dies. In this case, new basal stems either push their way through the dead growth to flower higher up […]

Aphids

Introduction Aphids weaken and destroy plants by sucking out the life-giving sap from leaves, stems and fruits. Plants attacked by aphids get yellow leaves and start to wilt, slowly dying. Aphids are also transporters of viral and bacterial plant infections. Description Aphids, also known as plant lice and in Britain and the Commonwealth as greenflies, […]

What could be wrong with my roses?

WHAT IS WRONG WITH MY ROSES? Whenever one thinks that the roses in a garden are not growing well or do not look healthy or even abnormal it is best to correctly identify the problem and the cause before attempting to spray with a pesticide. Very often it is a growing problem that reduces the […]

Downy Mildew

Introduction Downy mildew refers to any of several types of oomycete microbes that are obligate parasiteof plants. Downy mildews exclusively belong to Peronosporaceae. Downy Mildew is not as widespread and much more dependent on ideal temperatures and moisture conditions to cause devastating results on roses. Description Downy Mildew symptoms occur on leaves, stems, peduncles, calyxes […]

Rust

Introduction Ludwig’s Roses on: Rust is a disease caused by the parasitic fungus Phragmidium tuberculatumand and some other closely related species. It is specific to roses, and appears in spring and persists until the leaves fall. Susceptibility to rust varies widely among rose cultivars, and most modern roses are resistant to rust. Rose rust is the […]

Botrytis

Introduction           Prevalent especially during cool, wet weather. The disease is caused by several strains of the fungus Botrytis cinerea and attack blooms and canes, but is rarely seen on rose leaves. Blooms become spotted, then brown and finally completely rotten, in severe cases the stems can be affected and die back completely. Description During […]

Powdery Mildew

Introduction       Powdery mildew is one of the most common foliar diseases of roses. It is caused by the fungus Podosphaera pannosa. The conspicuous white growth can affect all aerial parts of the plant, but mainly new soft growth – producing microscopic spores that spread the disease. High humidity is favourable for infection, as well as plants […]

Black Spot

Introduction Black spot  is one of the most common and important diseases of roses throughout the world.It is caused by the fungus Diplocarpon rosae. Black spot will cause a general weakening of the plant so that progressively fewer and fewer blooms are formed if the disease is left unchecked due to loss of foliage. Plants […]

Pests & Diseases

See the different types of pests & diseases on roses and the control of them here. Fungal Diseases Black Spot Botrytis Downy Mildew Powdery Mildew Rust Harmful Insects, Beetles & Mites Aphids & greenfly Bollworm Chafer beetles (lace leaves at night) Rose chafer beetles (devour blooms) Mealybug Pernicious scale Red spider Rose borer wasps Termites […]

Fertilising

Regular fertilising roses during the growing season is essential, and plants react promptly to additional nutrition. However, fertilizer is not the solution to all ills – and two handfuls of fertiliser are not invariably better than one. Roses are often burned by having too much fertilizer placed in a heap next to the main stem […]

Watering

Adequate watering roses, ideally in combination with fertiliser, is important in determining the quality and extent of new growth. The quantity and intervals of watering depend not only on rainfall and on the soil type and thickness of the mulch, but also on temperature. Watering schedule Irrigate thoroughly once a week in moderate weather. Every […]

How to plant a rose

Roses are expected to thrive in your garden for up to 10 years. Soil preparation is therefore the actual important aspect when planting a rose. Select a good sunny spot that enjoys good air circulation. Roses can however also grow in an area that enjoys dappled sun light, where trees have been cut quite high to let […]

Pest and Disease Control – General Guidelines

To be effective, the spraying of roses for the control of pests and diseases needs to be carried out properly and with the correct understanding of both the pest and the applicable pesticides. Pesticide is the generally understood term for chemical compounds which control insects and diseases on plants. Read more about environmentally responsible pest […]